While Magnesium
chloride can be found in many natural bodies of water, due to extreme
pollution and high levels of lead and mercury it is difficult to find a pure, clean magnesium source.
Vinyl
chloride emissions from polyvinyl
chloride (PVC), ethylene dichloride (EDC), and vinyl
chloride monomer (VCM) plants cause or contribute to air
pollution that may reasonably be anticipated to result in an increase in mortality or an increase in serious irreversible, or incapacitating reversible illness.